It’s possible to oppose Hamas and the Israeli government at the same time. Hamas being fundamentalist terrorists doesn’t retroactively justify the Israeli government forcing millions of people into ghettos without access to clean water and regularly subjecting them to state violence. Or the ongoing settlement program, where Palestinian towns are forcibly evacuated and their property/homes stolen and given to Israeli settlers.
Two things can Both be bad at once, especially since the only reason Hamas exists is because of the desperation of Palestinians caused by Israeli state policy. Netanyahu’s government even gave them money at one point, because Hamas is good for his political goals. Hamas prevents a more democratic, progressive resistance to the occupation from forming, which makes it easier for Netanyahu’s government to justify their ongoing genocide/ethnic cleansing.